MESON Chess Problem Database
Problem Display
PID: 223342 (4rN2/qp3Qp1/p1n2P2/4pp1p/1R2Bkr1/K4N1P/3P3P/1bB2R2 w - - 0 1)
Morra, Juan Carlos
Suomen Shakki, 1960
#2
12 + 12
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qe3+
- 2.dxe3#
- 1...Qb8
- 2.d3#
- 1...Qa8
- 2.d3#
- 1...Rh4
- 2.Sg6#
- 1...Rg6
- 2.Sxg6#
- 1...Re6
- 2.Sxe6#
- 1...Ra8
- 2.Se6#
- 1...Rb8
- 2.Se6#
- 1...Rc8
- 2.Se6#
- 1...Rd8
- 2.Se6#
- 1...Bxe4
- 2.d4#
- 1...Sd4
- 2.d3#
- 1...Se7
- 2.Se6#
- 1...fxe4
- 2.fxg7#
- 1...b6
- 2.d3#
- 1...g5
- 2.Sg6#
- 1...Qe3+
- Tries
- 1.Se1+?
- 1...Qf2
- 2.d3#
- 1...Kg5!
- 1...Qf2
- 1.Sg1+?
- 1...Qf2
- 2.d3#
- 1...Kg5!
- 1...Qf2
- 1.Sh4+?
- 1...Qf2
- 2.d3#
- 1...Kg5!
- 1...Qf2
- 1.Sg5+?
- 1...Qf2
- 2.d3#
- 2.d4#
- 1...Kxg5!
- 1...Qf2
- 1.Bxb1+?
- 1...Qd4
- 2.d3#
- 1...Sxb4
- 2.d4#
- 1...Sd4
- 2.d3#
- 1...e4!
- 1...Qd4
- 1.Bc2+?
- 1...Qd4
- 2.d3#
- 1...Sxb4
- 2.d4#
- 1...Sd4
- 2.d3#
- 1...e4!
- 1...Qd4
- 1.Bd5+?
- 1...Qd4
- 2.d3#
- 1...Be4
- 2.d4#
- 1...Sxb4
- 2.d4#
- 1...Sd4
- 2.d3#
- 1...e4!
- 1...Qd4
- 1.Bxc6+?
- 1...Qd4
- 2.d3#
- 1...Be4
- 2.d4#
- 1...e4!
- 1...Qd4
- 1.Qxh5?
- threat
- 2.Qxf5#
- 1...Qe3+
- 2.dxe3#
- 1...Bxe4
- 2.d4#
- 1...fxe4
- 2.Sd4#
- 2.Qxg4#
- 1...Sd4
- 2.d3#
- 1...Rg5
- 2.Qxg5#
- 1...Se7
- 2.Se6#
- 1...g5
- 2.Sg6#
- 1...g6!
- threat
- 1.Se1+?
- Keys
- 1.Qg6!
- threat
- 2.Qxf5#
- 1...Qe3+
- 2.dxe3#
- 1...Rxg6
- 2.Sxg6#
- 1...Bxe4
- 2.d4#
- 1...fxe4
- 2.Sd4#
- 1...Sd4
- 2.d3#
- 1...Rg5
- 2.Qxg5#
- 1...Se7
- 2.Se6#
- threat
- 1.Qg6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 10
- Sets
- Q(i);CHECK,OGATE::P(C),XQ(i)
- Q(i);N_GUARD::B(A)+P(C)
- R(c);N_GUARD::S(L)
- R(c);N_GUARD::S(L),XR(c)
- R(l);N_GUARD::S(L),XR(l)
- R(l);N_GUARD::S(L)
- B(a);P_SPINB(a),SBLOCK,XB(I)::B(A)+P(C)
- S(h);S_CUTQ(i)::B(A)+P(C)
- S(h);S_CUTR(l)::S(L)
- P(e);P_SPINP(e),XB(I)::QAR(K)+P(J),XP(k)
- P(j);S_CUTQ(i)::B(A)+P(C)
- P(k);S_CUTR(c)::S(L)
- Tries
- Try
- S(F);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(A)+P(C)
- Refutation
- K(b);S_FLIGHT
- Try
- S(F);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(A)+P(C)
- Refutation
- K(b);S_FLIGHT
- Try
- S(F);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(A)+P(C)
- Refutation
- K(b);S_FLIGHT
- Try
- S(F);CHECK
- Refutation
- K(b);S_FLIGHT,XS(F)
- Try
- B(I);CHECK,XB(a)
- Vars
- Q(i);P_SPINQ(i)::B(A)+P(C)
- S(h);XR(H)::B(A)+P(C)
- S(h);P_SPINS(h)::B(A)+P(C)
- Refutation
- P(d);P_SPINP(d)
- Try
- B(I);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(A)+P(C)
- S(h);XR(H)::B(A)+P(C)
- S(h);P_SPINS(h)::B(A)+P(C)
- Refutation
- P(d);P_SPINP(d)
- Try
- B(I);CHECK
- Vars
- Q(i);P_SPINQ(i)::B(A)+P(C)
- B(a);P_SPINB(a)::B(A)+P(C)
- S(h);XR(H)::B(A)+P(C)
- S(h);P_SPINS(h)::B(A)+P(C)
- Refutation
- P(d);P_SPINP(d)
- Try
- B(I);CHECK,XS(h)
- Vars
- Q(i);P_SPINQ(i)::B(A)+P(C)
- B(a);P_SPINB(a)::B(A)+P(C)
- Refutation
- P(d);P_SPINP(d)
- Try
- Q(K);XP(f)
- Threat
- QAR1(K),XP(e)
- Vars
- Q(i);CHECK,OGATE::P(C),XQ(i)
- B(a);P_SPINB(a),SBLOCK,XB(I)::B(A)+P(C)
- S(h);S_CUTQ(i)::B(A)+P(C)
- R(c);N_GUARD::QAB1(K),XR(c)
- S(h);S_CUTR(l)::S(L)
- P(k);S_CUTR(c)::S(L)
- Refutation
- P(k);
- Try
- Actual
- Q(K);
- Threat
- QAR1(K),XP(e)
- Vars
- Q(i);CHECK,OGATE::P(C),XQ(i)
- R(c);XQ(K)::S(L),XR(c)
- B(a);P_SPINB(a),SBLOCK,XB(I)::B(A)+P(C)
- P(e);P_SPINP(e),XB(I)::R(B)+S(F)
- S(h);S_CUTQ(i)::B(A)+P(C)
- R(c);N_GUARD::QAB1(K),XR(c)
- S(h);S_CUTR(l)::S(L)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).